干旱区生态环境知识资源中心(Arid): Drought responses of profile plant-available water and fine-root distributions in apple (Malus pumila Mill.) orchards in a loessial, semi-arid, hilly area of China

Arid

DOI	10.1016/j.scitotenv.2020.137739
	Drought responses of profile plant-available water and fine-root distributions in apple (Malus pumila Mill.) orchards in a loessial, semi-arid, hilly area of China
	Song, Xiaolin; Gao, Xiaodong; Wu, Pute; Zhao, Xining; Zhang, Wei; Zou, Yufeng; Siddique, Kadambot H. M.
通讯作者	Wu, P ; Zhao, XN
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	723
英文摘要	The number of apple (Malus pumila Mill.) orchards has increased substantially in hilly regions of the Loess Plateau of China, as a significant element of the large-scale 'Grain for Green' ecological rehabilitation program that aims to conserve soil and water while improving the regions economic prospects. However, the long-term effects of the orchard expansion and the adaptive responses of apple trees to drought are not known. Thus, using a space-for-time substitution approach, we investigated plant-available water and fine-root distribution in the 0-8 m soil profile in apple orchards of various ages in a dry year (2015,392 mm rainfall) and the following year with normal precipitation (2016,500 mm rainfall). We found that plant-available water gradually decreased with stand age in the dry year, but increased in the normal year, especially in the 0-2 m soil layer. Fine root (<2 mm diameter) distribution and biomass increased with stand age and decreased with increasing soil depth in all treatment plots, predominantly in the 0-2 m layer. In all treatment plots, most of the soil layers in the deep soil (>2 m) had soil moisture storage deficit. In the dry year (2015), the apple trees increased both the average depth (D-50 and D-95 values) and biomass of their fine-root systems in response to water stress, relative to the normal year (2016). Thus, the apple trees extracted water primarily from the shallow (<2 m) layers in the normal year, but from deeper soil layers in the dry year, to sustain growth. The results of this study will help to guide land and agricultural water management in rainfed apple orchards in hilly regions of the Loess Plateau and similar dryland regions. (C) 2020 Published by Elsevier B.V.
英文关键词	Plant-available water Soil moisture storage deficit Apple orchards Stand age Management Loess plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000535463800019
WOS关键词	SOIL-MOISTURE VARIATIONS ; LAND-USE ; RAINWATER COLLECTION ; SPATIAL-DISTRIBUTION ; PLATEAU ; INFILTRATION ; CATCHMENT ; JUJUBE ; SYSTEM ; STAND
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	西北农林科技大学 ; University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324532
作者单位	[Song, Xiaolin; Wu, Pute] Northwest A&F Univ, Coll Mech & Elect Engn, Yangling 712100, Shaanxi, Peoples R China; [Song, Xiaolin; Gao, Xiaodong; Wu, Pute; Zhao, Xining; Zhang, Wei; Zou, Yufeng] Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Yangling 712100, Shaanxi, Peoples R China; [Song, Xiaolin; Gao, Xiaodong; Wu, Pute; Zhao, Xining; Zhang, Wei] Natl Engn Res Ctr Water Saving Irrigat Yangling, Yangling 712100, Shaanxi, Peoples R China; [Gao, Xiaodong; Wu, Pute; Zhao, Xining] Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; [Zhang, Wei] Northwest Aerf Univ, Inst Water Conservancy & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China; [Siddique, Kadambot H. M.] Univ Western Australia, UWA Inst Agr, Perth, WA 6009, Australia
推荐引用方式 GB/T 7714	Song, Xiaolin,Gao, Xiaodong,Wu, Pute,et al. Drought responses of profile plant-available water and fine-root distributions in apple (Malus pumila Mill.) orchards in a loessial, semi-arid, hilly area of China[J]. 西北农林科技大学, University of Western Australia,2020,723.
APA	Song, Xiaolin.,Gao, Xiaodong.,Wu, Pute.,Zhao, Xining.,Zhang, Wei.,...&Siddique, Kadambot H. M..(2020).Drought responses of profile plant-available water and fine-root distributions in apple (Malus pumila Mill.) orchards in a loessial, semi-arid, hilly area of China.SCIENCE OF THE TOTAL ENVIRONMENT,723.
MLA	Song, Xiaolin,et al."Drought responses of profile plant-available water and fine-root distributions in apple (Malus pumila Mill.) orchards in a loessial, semi-arid, hilly area of China".SCIENCE OF THE TOTAL ENVIRONMENT 723(2020).